Hair system crown addition?

[mhoffma1]

Has anyone had (or know of someone who has had) a crown addition (that is, a non-surgical hair system just for the crown)? I had a great HT a year and a half ago that made the front and mid-scalp part of my head look awesome - I would get a second HT for the crown but it is just so expensive (and there's no way I would go to another doc for an HT after the brilliant job my doc did).

So, I'm looking into this place that does crown additions and the pics look awesome (I know, of course they do) and the place claims that wearing this crown system will not impede hair growth underneath. Now, I've always felt I could spot a hair system a mile away, but I'm thinking that just a crown piece could really work and be undetectable etc.

Anyone have any knowledge of this?

Here's the place I'm looking into...
http://www.miragehairsystems.com/